[FFmpeg-user] Thumbnail tile slow on big video files
gyandoshi at gmail.com
Thu May 18 15:38:00 EEST 2017
On Thu, May 18, 2017 at 5:53 PM, <trash at skrilnetz.net> wrote:
> I run the code below to produce a tile thumnail from video files. That
> seems to be very slow on big video files. Anything that I do wrong, or I
> could improve to speed up processing?
> ffmpeg -ss 720 -i $input_path -f image2 -vframes 1 -aspect 4:3 -filter:vf
> w=128:h=97:x=(ow-iw)/2:y=(oh-ih)/2:color=black",tile=4x1 -y
Since your command produces exactly (or upto) 4 frames at an interval of
720 seconds, you can add -t 2900 -skip_frame nokey before -i
$input_path. Only keyframes are passed to the filters, so that should hurry
things up. Also, there's no need to keep the command running after 4 frames
have been found.
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